This document discusses different types of natural disasters including meteorological, geological, and hydrological disasters. Meteorological disasters include tropical storms like hurricanes, typhoons, and cyclones which form over oceans in different regions. Tornadoes form over land in Tornado Alley in the central US. Geological disasters include earthquakes, which occur along fault lines as tectonic plates collide or separate. Hydrological disasters involve water and include mudslides, rockslides, and avalanches caused by pressure building on external surfaces.

1. Natural Disasters

2. What is a Natural Disaster?
A natural disaster is an event caused by
natural forces of nature that has a large
effect on the human population.

3. Meteorological
Natural disasters of the atmosphere

4. Cyclone, Typhoon, Tornado,
Hurricane…
What’s the difference??

5. Cyclone, Typhoon, Hurricane
Define: A tropical storm that forms over an ocean
The difference is WHERE they form
Cyclone: Asia, South of the Equator
Typhoon: Asia, North of the Equator
Hurricane: Atlantic Ocean & East Coast of North
America

6. Tropical Storm Map

7. Test Your Knowledge
Write these down:
What wind storm occurs in these countries:
United States:
Australia:
India:
Japan:
Canada:

8. Cyclone, Typhoon, Hurricane
(Video)
Characteristics: Hard rain, flooding, high winds
Duration: 8 – 24 hours of full force
Where: East Coast, USA

9. Tropical Storm Paths

10. East Coast, USA

11. Let’s see what they can do

12. Wait, what’s a Tornado??
Isn’t that the same??

13. Tornado
A Tornado forms over land.
Also called a Twister
Occurs in “Tornado Alley”
in the USA

14. Tornado Alley
“Tornado Alley” is the area
where Tornados form the most.
It includes the states of:
Texas, Oklahoma, Kansas,
Nebraska, and South Dakota

15. Tornado Alley
How and why do they occur?
(Video)
The middle states are located
between the warm air of the
Gulf of Mexico and the cold air
of the Pacific Ocean from
Canada.

16. Extreme Weather, USA

17. Let’s see what they can do

18. Tornados vs. Hurricanes

19. Geological
Disasters
Natural disasters of the
land

20. Earthquake?
What’s that??

21. Earthquakes
A sudden shaking of the ground
as a result of movements of the
earth’s tectonic plates

22. How do they happen?
The earth’s surface rests on moving
sheets of crust called tectonic plates
These plates move VERY slowly

23. How do they happen?
When the plates collide, they create mountains
When the plates separate, they form volcanoes

24. Slides
3 Types: Mudslide (Mud), Rockslide (Rocks), Avalanche
(Snow)
Characteristics: Accelerating materials in large amounts
Cause: Pressure on the external surface

25. Hydrological Disasters
Natural disasters of the water